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C/C++ Source or Header  |  2006-08-11  |  755 b   |  37 lines
  1. #ifndef __ASM_CPU_SH3_DMA_H
  2. #define __ASM_CPU_SH3_DMA_H
  3.  
  4. #define SH_DMAC_BASE    0xa4000020
  5.  
  6. /* Definitions for the SuperH DMAC */
  7. #define TM_BURST    0x00000020
  8. #define TS_8        0x00000000
  9. #define TS_16        0x00000008
  10. #define TS_32        0x00000010
  11. #define TS_128        0x00000018
  12.  
  13. #define CHCR_TS_MASK    0x18
  14. #define CHCR_TS_SHIFT    3
  15.  
  16. #define DMAOR_INIT    DMAOR_DME
  17.  
  18. /*
  19.  * The SuperH DMAC supports a number of transmit sizes, we list them here,
  20.  * with their respective values as they appear in the CHCR registers.
  21.  */
  22. enum {
  23.     XMIT_SZ_8BIT,
  24.     XMIT_SZ_16BIT,
  25.     XMIT_SZ_32BIT,
  26.     XMIT_SZ_128BIT,
  27. };
  28.  
  29. static unsigned int ts_shift[] __attribute__ ((used)) = {
  30.     [XMIT_SZ_8BIT]        = 0,
  31.     [XMIT_SZ_16BIT]        = 1,
  32.     [XMIT_SZ_32BIT]        = 2,
  33.     [XMIT_SZ_128BIT]    = 4,
  34. };
  35.  
  36. #endif /* __ASM_CPU_SH3_DMA_H */
  37.